Built in 1850, this viaduct spans 1.1 kilometers from Bubny to Masarykovo Nadrazi (southbound), meaning it actually traverses a large part of Prague, at this portion in Karlin (if I understand the boroughs correctly). The street under this arch of the viaduct is Sokolovska, although the viaduct crosses 5-6 streets along the way, depending on what you're counting. One of the most interesting streets, not seen here, is Rohanske nabrezi, which used to be a railway line, meaning that until the 2017-2021 reconstruction, coal soot from steam locomotives was still visible on the arches:

en.wikipedia.org/wiki/Negrelli_Viaduct#/media/File:Northwestern_Railway_Negrelli_Viaduct_eastern_side.jpg

In any case, getting back to my own photo, when facing west through the Sokolovska arch, it is often possible to get good sunset pictures, as the sun aligns quite well with the arch, without any buildings blocking the view. I still haven't been able to get a good camera to get this shot (I've been having technical problems with my cameras for a number of years, with a minimal budget to address the problem), but I have even been able to get the shot with my cameraphones, as you can see here. For this shot, I was using my Nokia 301.